Method of forming inlays



' g- 4, 1931- c. w. SCOTT 1,816,915

METHOD OF FORMING INLAYS Filed April 12. 1929 IN VEN TOR.

Y Mi/ M @m & M

ATTORNEYS.

Patented Aug. 4, 1931 UNITED STATES PATENT OFFICE cans'ron w. soo'rr, or sramorinn-iussnonusnrrs, nssronon' 'ro mm summon) conronamrou, or INDIAN oncnnnn. ms'sncnusnrrs, A coaronnrrou or ms- Application filed s am,

This invention relates to the production of inlaid articles of p roxylin plastic materials such as celluloid, fi rloid, etc., and has par-' the invention is to produce inlaid designs of any desired do so of complexit wlthout thenecessity of ne hand-work an by methods permitting of, mass production. Monorams, of course, will not ordinarily be prouced in mass unless used for trade-mark purposes; but-the invention is in another aspect. directed to the, production of this species of design with a de cc of accuracy not hitherto attainable. A grther object "of the invention is the production of inlaid designs of a degree of permanence permitting their use in the striking face of a golf club.

Referring to the dra Fig. 1 is a plan view of a blank-in which shghtly deeper than those in the blank.

the inlay is to be set;

Fig. 2 is a similar-view showing the engravmg of a recess to receive the inlay;

Fig. 3 is a section on line 3-3 of Fig. 2;

Fig. 4 is a plan view of a mold in which the inlay is formed;

Fig. 5 is a section on line 55 of Fig. 4:;

Fig. 6 is a face view of the molded insert;

Fig. 7 is a section on line 77 of Fig. 6;

Fig. 8 is a plan view of the blank and molded insert after assembly;

Fig. 9 is a section on line 9-9 of Fig. 8;

Fig. 10 is a plan view of the finished article; and

Fig. 11 is a section on line 11-11 of Fig. 10. I

. In the description of the inlaying process which follows, I have chosen a mono ram as the design to be re roduced, for t 's cmbodies most of the difliculties resent in the rfiproduction of any type of esign forv an i ay. The monogram shown has its letters interlaced, but so arated letters can be "formed with equal acility. The main difli culty in forming an inla having any degree of complexity of course 'es in securing perfect registry between all parts of the inlay and the recess into which the inlay is to be set. By my improved process, parts of unrnon or FORMING mnnys 1828. serial No. 354,868.

the inlay are at all times positivel held in perfect registry, and trouble from t is source From the same template, and with the same reduction setting of the pantofgra h, is formed a recessed mold 18, re erably of brass or other metal. This mo d is cut with a border 19 and amonogram Q0 exactly similar in size to those out in the blank exce t that the recesses in the mold are preferab y The mold is also preferably formed with a blank severing edge 21 surrounding the recessed design and operating to mold the body of the inlay blank. This blank 22 is of a pyroxylin plastic or similar composition and is formed in the mold 18 in the customary manner of molding such articles. When formed, this blank will have a raised ortion 23 corresponding to the border 0 the design and similarly raised portion 24 corresponding tothe monogram. These portions are of exactly the correct sha e to fit into the recesses 16, 17 of the bla except that they .are slightly longer than the recesses are deep, and are held together solidly and without chance for slippage or distortion by the main body portion of the inlay blank.

The interfitting surfaces of the main blank and the inlay blank are then coated with a suitable pyroxylin lastic cementing solvent and are pressed tig 1tly together as shown in I Figs. 8 and; 9. Durin thi'sassembling ogeration, the body of tie inlay blank 01 s the different portions of the design firmly together so that any displacement or lack of registry between the several details is impossible. After firm adhesion has resulted from the drying of the solvent, the body portion IQ: Anal of the inlay blank is cut or milled oil, leaving only the design imbedded in the body of the main blank as shown at 25 in Figs. 10 and 11. The inlay as thus produced is sub stantially integral with the main blank so that it cannot be dislodged by the impact of a golf club on the ball, and is of any depth desired to permit shaping of the surface or to provide for wear. If the inlay is for the v striking face of a golf club, the inlaid blank is then mounted in its proper position on the club and finished 0d flush with the striking face. The rigidity and permanence of the inlay permit this to be done without danger 15 of disturbing the main design.

What I claim is: 1. A method of making plastic inlays which comprises forming in the surface to be inlaid recesses corresponding in configuration to the design to be produced, forming an inlay blank with projecting portions shaped to interfit with the recesses and held solidly in their proper relative positions by the integral body portionof the inlay blank, said projections being of slightly greater length than the depth of the recesses, applying to the recess and to the projecting portions of the inlay blank a substance adapted to cause their adhesion, inserting the projecting portions of the inlay blank into the corresponding recesses while the projections are still held assembled by the body portion, and then cutting away the body portion of the inlay blank and that part of the projecting portions extending outside the recesses.

2. A method of making plastic inlays which comprises mechanically cutting from a template recesses in the surface to be inlaid, corresponding in configuration to the design I 40 to be produced, similarly cutting a mold from the same template, molding an inlay blank in the mold with projecting portions Y shaped to interfit withthe recesses and held solidly in their proper relative positions by the integral body portion of the inlay blank, applying to the recess and to the projecting portions of the inlay blank a substance adapted to cause their adhesion, inserting the pro- 'jecting portions of the inlay blank into the 9 corresponding recesses while the projections are still held assembled by the body portion and then cutting away the body portion of the inlay blank.

In testimony whereof I have aflixed my signature. a

' CREST-ON W. SCOTT. 

